KVM: x86: Directly return __vmalloc() result in ->vm_alloc()

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Directly return the __vmalloc() result in {svm,vmx}_vm_alloc() to pave
the way for handling VM alloc/free in common x86 code, and to obviate
the need to check the result of __vmalloc() in vendor specific code.
Add a build-time assertion to ensure each structs' "kvm" field stays at
offset 0, which allows interpreting a "struct kvm_{svm,vmx}" as a
"struct kvm".

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-01-26 16:41:12 -08:00 • committed by Paolo Bonzini

parent d18b2f43b9

commit 1a625056cc

2 changed files with 8 additions and 16 deletions

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12

arch/x86/kvm/svm.c

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12

arch/x86/kvm/vmx/vmx.c

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